Steam-generator



s. ANDERSON.

STEAM GENERATOR.

APPLICATION FILED 0:CT.29,1918. 1,318,825'. Patented 0ct.14,1919.

SWAN ANDERSON, or MINNEAionis, MINNESOTA.v

STEAM-GENERATOR.

. T all ifi/wm t may concern.'

Be it knownthat I, SWAN ANDEIisoN, -a citizen of the Uni-ted States, residing at Minneapolis, in the count-y of Hennepin and State of Minnesota, have invented a new v.and useful Improvement in lSteam-Genertors, of which the following isa specification. I

The object of thisi invention isfto lprovide a maximum Hue surface in a steamy generator whereby vwater is rapidly and most effectively ccnverted intojsteam and the pressure of steam maintained under-high pressure. A further object is greater econoi'nyo f fuel in the prot uction of steamand greater simplicity of construction. A still furtherobject is the production of a steam generator in which a constant circulation of water therein is maintained to prevent the incrustation of thelues and the collecting ef' sediment.'

With these and other objects in view my invention comprises the features of construction and combination of parts hereinafter more particularly described and claimed.

In the accompanyingdrawing forming part of this specification, Figure 1 is a front elevation of my invention, the inclosing structure being broken away and in section to more completely expose the interior of the generator; Fig. 2 is a back elevation of the structure illustrated in Fig. 1, the inclosing casing beingy broken away and in section; Fig. 3 is a longitudinal section taken on the line X-X of Fig. l; Fig. 4 is an end view of one of the flues, and Fig. 5 is a side elevation ofa detail of one of the iiues.

My invention comprises four upright ducts 2, 3, 4, and 5 closed at their lower ends and connected at their upper ends by four transverse ducts 6, 7 8 and 9, and four double elbows 10, 11, 12 and 13. Arranged across the front pair of vertical ducts 2 and 3 are a vertical series of horizontal tubes or ducts 13, which are substantially straight throughout their lengths, and arranged across the space between the back pair of vertical ducts 4 and 5 are a corresponding vertical series of tubes or ducts 14, each of which is flexed downwardly between its ends. The front and back horizontal series of tubes 13 and 14 are connected by longitudinal tubes 15, there being a plurality of such tubes connected with each horizontal pair of front and back tubes 13 and 14. k'The tubes at the sides of each horizontal group extend horizontally from front to back, but

kSpecification of Letters Patent. Application filed october 29, isis. serial No. 260,112fi` s at theY other end Patenten oct. 14, 1919.

the tubes of eachgroup as they approach the center one slant downwardly from the front tube `13 of'ea'ch horizontal pairto theback tube 14. Each'set of tubes'l is thus arranged in the form of a gutter which extends horizontallyat one end' and which molines downwardly from each' side toward'the center. As a result a free circulation of 'wateris setup in the assemblage of ducts andtubes'described.

VThe heater for heating waterY in the tubes may be a -hydrocarbon burner 16 placed Vbelow the tubes in the' center of the strucany other suitable' heater-desired.'

The structure described is inclosed in an outer casing 17, which is insulated by the -eover 18made of asbestosor'anyY other poor 'fheat conducting material'. casingis a ,Smoke vent, 011 Passagen). and fin the'lower portion of the casing'is a'hinged draft door 20. The corner'ducts 2, 3, 4 and In the top `ofthe 5, horizontal ducts 6, 7, 8 and 9 and horizontal tubes 13 and 14 are rrespectively square in cross section as illustrated in Fig. 4, the ends of the ducts and tubes being rounded for` convenience in swaging them into the associated connected elements. The longitudinal tubes 15 are preferably round in cross section and are swaged by their ends into the horizontal tubes 13- and 14. The front and back Seriesl of tubes 13 and 14 are of smaller cross sectional area than the vertical ductsl 2, 3, 4, and 5 and the longitudinal tubes 15 are smaller in cross sectional area than thetubes of the front and back horizontal series 13 and 14. The entire! device presents a maximum heating surface area for generating steaml therein and facilitates the conversion of water into dry Steam quickly. The uppei` portion of the corner ductsandhorizontal ducts 6, 7 8 and 9 andelbow elements produce a separating chamber for the steam from the water. Water is preferably fed into the lower portion of the ducts and tubes at any suitable point, that illustrated beinged to one of the horizontal ducts such as 6.-V

In operation water is maintainedV at a level slightly Vabove the upper set of tubes l5. A water gage 23 is provided by which the depth of water maintained in the structure can be ascertained from time to time. The entire structure may be made of comparatively small dimensions for 'generating a maximum quantity of dry steam under high pressure quickly.

The front and back pairs corner ducts constitute .a pair of 'front and back manifolds having front and back sets of cross ducts 13 and'lto which the lfront and back ends of exposed tubes 15 `are respectively connected7 said manifolds forming a water heat-ing structure having a steam separator vat the top. This entire structure is so arranged that a maximum heat exposing surface is presented for converting water into steam. A plurality of return hot Water conducting transversely arranged tubes 23 are also connected between the upright ducts 2 and d and 3 and 5 respectively for facilitating the vcirculation of water throughout the apparatus.

In accordance with the patent statutes, I have described the principles of operation of my invention together .with Ythe apparatus which I now considerztorepresent the best embodiment thereof, but ,If desire to have it understood that the Construction shown is of connected" i only illustrative and that the invention can be carried out by other means and applied t0 use Aother than those above set forth withyin the scope of the following claim.

Having described my invention, what I "claim as new and desire to protect by Letters Patent is A steam generator comprising four vertical corner ducts, four horizontal ducts connecting said corner ducts at their upper vendsra plurality of straight horizontal ducts connecting one pair of the ycorner ducts, a plurality of ducts inclined downwardly toward their centers and connecting the other pair of corner ducts, a plurality ofv tubes ,connecting veach pair of said straight and inclined ducts respectively whereby each set of .said tubes is arranged in theform of a l.gutter which extends horizontally at one end and which at the other end inclines ldownwardly from each side toward the center, aiire casing inclosing said ducts and tubes, and heating means in said casing be- ,neath said tubes.

kIn testimony whereof, I have signediny name to thisspecification. SWAN ANDERSON.

.'Copicsof this patent `may be obtained for five cents each, by addressing the Commissioner of Patents.

Y YWashington, D. C. 

